Architecture & Nature in Düsseldorf
Let's face it, Düsseldorf is a great city for walking. Not too touristy, very green and full of gems. A recent walking tour was from the neighborhood Flingern to the Oberkassel bridge. This is a 5k walk and has some pretty things en route.
I plan on doing a Düsseltal and Flingern tour really soon, they have some beautiful buildings there! Stay tuned.